Lock for sliding windows



April 25, 1967 R. DALLAIRE LOCK FOR SLIDING WINDOWS 2 Sheets-Sheet 1 Filed Dec. 4, 1964,

April 25, 1967 R. DALLAIRE 3,315,998

LOOK FOR SLIDING WINDOWS Filed DeC. 4, 1964 2 Sheets-Sheet 2 \Ammkm. xxmyxmw UAQXLLxM United States Patent 8 Claims. (Cl. 292-61) Claims The present invention relates to an improved lock for use with sliding windows, and particularly to a lock which may be readily removed for purposes of cleaning, and to facilitate removal of window panes.

A lock according to the invention will be particularly useful with sliding window systems such as disclosed in my co-pending Canadian patent application Serial No. 898,225 filed on March 19, 1964.

It is therefore an object of the invention to provide a lock which may be securely mounted to the sill or frame of a sliding window and is readily removable therefrom.

It is a further object of this invention to provide a lock which may be quickly and simply assembled, for the purpose of reduced manufacturing costs, and subsequently to facilitate cleaning of the lock from time to time during use.

A still further object of the invention is to facilitate removal of window panes in a sliding window system, through the provision of a lock which may be readily removed from the window without the use of screw nails or other fastening means, and which may be instantly and firmly atfixed to a window sill in one or more locations, again without the use of screw nails.

A still further object of the invention is to provide a lock comprising in combination a housing, a bolt adapted to be slidably and rotatably contained in said housing, a spiral slot in said housing, a handle projecting from said bolt adapted to project through said slot, spring means normally urging said bolt out of said housing, a base member, said housing being removably afiixed to said base member.

Reference will now be made to the drawings in which:

FIGURE 1 is an exploded perspective view of a lock according to the invention;

FIGURE 2 is a front elevation;

FIGURE 3 is a rear elevation;

FIGURE 4 is a top plan view;

FIGURE 5 is a side elevation of position.

FIGURE 6 is a view corresponding to FIGURE 5 with the lock in open position.

FIGURE 7 is a sectional view through a lock structure according to the invention, taken along lines 7-7 of FIG- URE 8; and FIGURE 8 is a sectional view taken along lines 8-8 of FIGURE 7. Detailed reference will now be made to the drawings, but it will be appreciated that the following description is by way of example only, and the invention should be limited only by the scope of the appended claims. In the following description like reference numerals are used to identify like parts.

Referring now in detail to FIGURE 1, the components of a lock according to the invention are shown in exploded perspective view, and comprise a base member 10, a main housing member 11, a housing floor member 12, a spring 13, and a bolt 14 provided with an axial projection 14a and a handle 15. Main housing member 11 is in the general shape of an inverted U, and includes base portions 11a and 11b. A spiral slot 16 is provided in the upper, rounded portion of housing 11. A pair of tracks 17a and 17b are provided on the interior of main housing member 11, and are adapted to receive L-lugs 18a and 18b respectively on housing floor member 12. The upper surface of housing floor member 12 is semi-circular in transverse cross-section, and when floor member 12 is a lock in operative 3,3 15,998 Patented Apr. 25, 1967 slidably engaged through lugs 18a and 18b in tracks 17a and 17b, respectively, of main housing member 11, the two members together create an internal cylindrical bore. The interior of main housing 11 is provided with generally triangular ridges 19a and 19b on each side of the interior, which form a slight continuation of the circular bore, ridge 19a being clearly illustrated in FIGURE 1, while ridges 19a and 19b are both illustrated in cross section in FIGURE 7.

Handle 15 is adapted to project through spiral slot 16, and bolt 14 is adapted to be slidably and rotatably engaged between main housing member 11 and housing floor 12, when assembled. Housing base members 11a and 11b are each provided with at least 2 lugs 20 projecting from the side thereof. In the case of base portion 11a, lugs 20a and 20b are illustrated in FIGURE 1. Main base member 10 is provided with at least two countersunk holes 21 and 22, adapted to receive suitable fastening devices such as screw nails, whereby the base portion 10 may be aflixed, for example, to a window sill. Base 10 has an upstanding wall 23 and 24 at each side thereof, which continue slightly along the rear edge of base member 10, to serve as a back stop for lugs 20 when main housing member 11 is mounted on base 10, as will be explained hereinafter. It will further be seen that walls 23 and 24 are each provided with a lug 23a and 24a respectively, which project in- Wardly from the top thereof. Vertical stop members 231) and 24b are also provided on the interior of walls 23 and 24 respectively. Fingers 25 and 26 rise from the rear of base 10, and also act as stop members when the lock housing is mounted on base 10. A spring finger or detent 27 is integral with and rises from the floor of base 10 and is provided with an integral raised wedge portion 27a. Finger 27 extends slightly beyond the end of base 10 where it terminates in a vertical lug 27b. Detent 27 is normally inclined upwardly and rearwardly from the point at which it is united with the floor of base 10.

Base members 11a and 11b of housing 11 are provided with L-lugs 28a and 28b on the forward edge thereof, and countersunk screw nail holes 29a and 29b are also provided through base portions 11a and 11b, respectively. Thus, housing 11 when assembled with floor member 12, spring 13 and bolt 14 may either be screwed directly to a window sill or frame by means of holes 29a and 29b, or alternatively may be slidably engaged with a sill track.

Referring now to the assembled unit illustrated in front plan in FIGURE 2, housing floor member 12 will be seen to be engaged with main housing member 11, by means of lugs 18a and 18b on floor member 12, and tracks 17a and 17b on main housing member 11. It should be noted that lugs 18a and 18b may conveniently be made slightly narrower at one end of floor member 12, while the groove in tracks 17a and 17b may be made slightly narrower at one end, to achieve a light locking effect when fioor member 12 is slidably engaged with main housing 11. As illustrated in FIGURE 3, main housing 11 is provided with an end closure of wall 110. Lugs 25 and 26 on the rear of main base member 10 will be seen projecting above base portions 11a and 11b of main housing 11, while lug 27b also projects upwardly and as seen in FIGURE 4 beyond the floor of main base member 10.

As illustrated in FIGURES 5 and 6, bolt 14 projects well beyond the leading edges of the base, and of the main housing 11, when in operative position, while bolt 14 and axial projection 14a are completely contained within housing 11 when the lock is not in use.

Rear wall of housing 11 is provided with an integral internal, wedge-shaped projection 11d centrally located thereon, and which serves to maintain spring 13 in centered position inside housing 11. As is also clear in FIGURE 7; bolt 14 is open on its internal end, in order to receive spring 13 which is contained therein between the forward wall of bolt 14 and rear wall 110 of housing 11. Projection 11d is wedge shaped on its lower edge to facilitate installation of spring 13.

FIGURE 8, screw nails 30 are shown, holding main base to sill 31. As seen in FIGURE 7, detent 27 prevents removal of the housing, by means of lug 2.7a which acts against rear wall 110 of the housing 11 to prevent forward movement thereof relative to main base 10, while rear fingers 25 and 26 on main base 10 prevent rearward movement of main housing 11 relative to the main base 10. It will be realized that through manual downward pressure on lug 27b of spring detent 2'7, lug 27a will be swung clear of the bottom of rear wall 110 permitting the housing to be moved forward on base 10. Referring again to FIGURE 1, it will be appreciated that lug b on base 11a of housing 11 will abut against vertical projection 23b on end wall 23 of base 10, thus limiting the distance it is possible to slide housing 11 forward on main base 10 after spring 27 has been depressed, at which point housing 11 may be freed from base 10 by lifting upward. It will be further appreciated that when housing 11 is in locked engagement with main base 10, lug 2011 projects under finger 230 on the top of end wall 23 of base 10, while lug 20a projects under finger 23a which also projects forward on the top of end wall 23. A similar relationship exists between the lugs projecting from base portion 11b of housing 11, and the lugs 24a and Ma on end Wall 24. When housing 11 has been slid forward on base 10, lug 20b will come in contact with vertical projection 23b, on wall 23, and both lugs 20a and 2% will be clear of the fingers on wall 23, permitting main housing 11 to be removed from base 10 by lifting upward. Because housing 11 is removable from base 10 when it has been slid forward a distance equal to the width of lugs 20 it is necessary that base 10 be mounted on a window sill removed from the panes thereof a distance at least equal to the width of lugs 20. The base 10 may of course be affixed to the window sill with panes in place or removed.

To assemble the components of a lock according to the invention, spring 13 is inserted within bolt 14, handle 15 of bolt 14 is passed through spiral slot 16, and at the same time spring 13 is compressed, and is slid upwardly along end wall 110 of housing 11 until it passes over wedge 11d. Housing floor member 12 is then engaged with track-s 17a and 17b and pressed home. Main housing 11 may then be afiixed to base 10 in the manner described above. Removal of housing 11, again as described above, may be accomplished quickly and easily, when it is desired to remove panes from a sliding window.

I claim:

1. A lock comprising in combination a housing having a cylindrical bore therein, one end of said bore being open, the other end being closed, a spiral slot in said cylindrical bore, a hollow cylindrical bolt, a handle projecting from said bolt, said bolt being slidably and rotatably engageable within said bore, spring means within said bore normally urging said bolt in the direction of the open end of said bore, said handle projecting through said slot, said housing having a plurality of lugs projecting from the bottom thereof, a generally fiat base member having a relatively low wall at two opposed sides thereof, at least one vertical stop and two horizontal lugs projecting from each of said walls, said lugs on said housing being slidably engageable with said lugs on said base to prevent relative vertical movement therebetween, and spring urged detent means on said base adapted to releasably engage said housing when said base lugs and said housing lugs are engaged, said spring locking means normally preventing relative horizontal movement between said base and said housing.

2. A lock according to claim 1, said housing have a removable floor, a lug extending from each side of said floor and running the length thereof and grooves in said housing adapted slidably to receive said lugs.

3. A lock according to claim 2, said lugs on said floor being narrower at one end than at the other and saidgrooves in said housing being narrower at one end than at the other whereby said floor will be lightly locked to said housing when said lugs and grooves are in union.

4. A look according to claim 1, said housing having integral base members extending from each side thereof, a countersunk screw hole in each of said base members, the lugs on said housing projecting from said base members thereon.

5. A lock according to claim 1, said base having a plurality of countersunk screw holes therein.

6. A lock according to claim 1, the bore in said housing having a wedge-shaped finger therein centered on said closed end to maintain one end of said spring in centered relationship therein.

7. A lock according to claim 1, said spring detent means on said base comprising a spring finger integral at one end with said base and rising therefrom at its other end, said finger extending slightly beyond said base and terminating in a vertical lug, a wedge shaped lug on said finger adapted to prevent relative horizontal movement between said base and said housing when in engagement with said housing.

8. A lock according to claim 1, said bolt having an external axial extension or stop projecting from the closed end thereof.

References Cited by the Examiner UNITED STATES PATENTS 10/1908 Rankins 292-61 4/ 1932 Doucette 2922 

1. A LOCK COMPRISING IN COMBINATION A HOUSING HAVING A CYLINDRICAL BORE THEREIN, ONE END OF SAID BORE BEING OPEN, THE OTHER END BEING CLOSED, A SPIRAL SLOT IN SAID CYLINDRICAL BORE, A HOLLOW CYLINDRICAL BOLT, A HANDLE PROJECTING FROM SAID BOLT, SAID BOLT BEING SLIDABLY AND ROTATABLY ENGAGEABLE WITHIN SAID BORE, SPRING MEANS WITHIN SAID BORE NORMALLY URGING SAID BOLT IN THE DIRECTION OF THE OPEN END OF SAID BORE, SAID HANDLE PROJECTING THROUGH SAID SLOT, SAID HOUSING HAVING A PLURALITY OF LUGS PROJECTING FROM THE BOTTOM THEREOF, A GENERALLY FLAT BASE MEMBER HAVING A RELATIVELY LOW WALL AT TWO OPPOSED SIDES THEREOF, AT LEAST ONE VERTICAL STOP AND TWO HORIZONTAL LUGS PROJECTING FROM EACH OF SAID WALLS, SAID LUGS ON SAID HOUSING BEING SLIDABLY ENGAGEABLE WITH SAID LUGS ON SAID BASE TO PREVENT RELATIVE VERTICAL MOVEMENT THEREBETWEEN, AND SPRING URGED DETENT MEANS ON SAID BASE ADAPTED TO RELEASABLY ENGAGE SAID HOUSING WHEN SAID BASE LUGS AND SAID HOUSING LUGS ARE ENGAGED, SAID SPRING LOCKING MEANS NORMALLY PREVENTING RELATIVE HORIZONTAL MOVEMENT BETWEEN SAID BASE AND SAID HOUSING. 